Dial-knob for combination-locks



FTG-4 Patented Apr. 26, 1892.

' G. H. WILLIAMS DIAL KNOB FOR COMBINATION LOCKS- (No Model.)

INVEN TOR @7 4! UNTTED STATES PATENT OFFICEQ GEORGE H. 'WILLIAMS, OFBOSTON, MASSACHUSETTS.

DIAL-KNOB FOR COMBINATION-LOCKS.

SPECIFICATION forming part Of Letters Patent No. 473,686, dated April26, 1892.

Application filed July 20, 1891- Serial No. 400.163. (No model.)

To all whom it may concern:

Be it known that I, GEORGE H. WILLIAMS, a citizen of theUnitedStates,residing at Boston, in the county of Suffolk and State ofMassachusetts, have invented a new and useful Improvement in Dial-Knobsfor Combination- Locks, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings,forming a part of this specification, in explaining its nature.

The invention relates to a combination-lock for safes, boxes, &c., inwhich the dial'face is flush or substantially flush with the surface ofthe door or other part bearing the lock, and which dial is adapted to beturned by a turning knob or device which is normally held in a recess orcavity in the dial with its outer surface flush with the outer surfaceof the dial, completely closing or covering the opening to the cavityand concealingit, if desired, and which turning knob or device isadapted to be moved outward from said cavity to project in front of theface of the dial and provide means for turning the dial.

It further relates to a dial and knob or turning device of the characterabove specified, having a spring for automatically moving it outward anda latch for looking it in the cavity against the pressure of the saidspring.

In the drawings, Figure 1 is a view in perspective and section,representinga portion of the dial and a safe-door and representing thedial as flush with the face of the safe-door. Fig. 2 is a view invertical section, showing a portion of the dial and its operating'knob,the knob being moved outward in relation to the face of the dial. Fig. 3is a view in perspective, enlarged, of the inner end of alatch-opcratingpin, hereinafter referred to. Fig. 4: is a view in perspective,enlarged, of the knoblatch. Fig. 5 is a view in plan of a sleeve, towhich reference is hereinafter made.

' The invention is represented as applied to a safe-door. A representsthe door, Ct its outer surface B, the dial, the outer surface I) ofwhich is flush with the surface a of the door. The dial has aninwardly-extending hub 11, which is connected with the spindle boperating the tumblers of the lock, and the cavity 17 extending inwardfrom its front surface to the shoulder b and thence in reduced sizethrough the hub. The recess preferably is a hole cl across the extensionwhich holds the latch and in which it is movable. The latch has theengaging end d, which enters a hole d in the piece 61 when the knob isin its closed or normal position. To release the latch and allow thespring to throw the knob outward, I have shown a push-pin E, containedin a central longitudinal hole 6 in the knob .and having alimited rangeof movement therein. The inner end of this push-pin has a recess e andinclined surfaces 6 on each side of the recess, and the latch D has areduced section 6 (see Fig. 4,) which enters the reccss e, and inclinesc against which the inclines e ride. A spring 6 bears against the end ofthe latch and serves to move it at the proper time or when its latchingend lSllll line with the hole d When it is desired to unlock the safe orother article to which the invention is applied, the latch holding theknob in the dial-recess is released by pushing the latch-pin inwardsufficiently to cause the inclines e to ride upon the inclines e of thelatch,and thereby move the latch laterally in relation to the knobsufficiently to disengage its latching end d from the engaging-hole (1and the spring then moves the knob outward so that it projectssufficiently in front of the dial to serve as a handle or projection bymeans of which the dial may be turned. The closed position of the knobis represented in Fig. 1 and its operative position in Fig. 2.

I would not be understood as limiting the invention, however, to theespecial form of knob moving and latching devices herein specified, asthere are other obvious means for latching the knob in place and forreleasing the latch. Neither would I be understood as limiting theinvention to the construction employing a latch and push spring, as Iconsider that any construction employing a dial flush with a case andprovided with a recess holding a movable knob adapted to be moved andheld flush with the surface of the dial contains some of the essentialelements of my invention.

Having thus fully described my invention, I claim and desire to secureby Letters Patent of the United States-- 1. A combination-lock havingits operatingdial flush With the surface of the article to which it isattached and a dial-turning knob or device held normally in a recess inthe dial with its outer surface flush or substantially flush with thedial-surface and adapted to be moved outward from said surface toprovide means for turning the dial, substantially as J and forthe'purpose described.

as and for the purposes described.

3. The combination, in a combination-lock, of a dial having a recessextending inward from its face and a turning knob or device contained insaid recess and a spring for moving it outward therein, as and for thepurposes described.

4. The combination, in a combination-lock, of the dial having a recessextending inward from its front plate, a turning knob or devicecontained in said recess and movable out wardly therefrom, and a latchfor holding it in its closed position in said recess, substantially asdescribed.

5. The combination, in a combination-lock, of the dialhaving aholeopening from its face, a knob or turning device contained in said hole,a spring for moving said knob or turning device outwardly, and alatchfor holding said knob or turning device closed in said hole, as and forthe purposes described.

6. The combination, in a combination-lock, of the dialplate having ahole extending from its face, with a turning knob or device contained insaid hole and movable lengthwise the hole, a spring for moving said knobor turning device outward, a latch for lockingit in its closed position,and a latch-disengaging pin, substantially as described.

7. The combination,in a combination-lock, of the dial-plate having acentral hole eXten ding inward from its face, the knob having thecentral extension 0 and spring-holding cavity 0 and pin-hole e, thelaterally-movable latch D, carried in a hole in said extension andhaving the inclined surfaces 6*, the piece 01 having the latch-hole 61the knob-stop and latchpin E, having the recess e to receive a portionof the latch D, and the inclined surfaces e to engage the inclinedsurfaces 6 of the latch, as and for the purposes described.

GEORGE H. XVILLIAMS. \Vitnesses:

F. F. RAYMOND, 2d, J. M. DOLAN.

